Gasoline & Diesel-Bulk Plants & Terminals OPW is your single source for Bulk Plant & Terminal Loading Arm solutions. Whether you are replacing existing Bottom Loading equipment or building a completely new facility we have a solution to fit your application. OPW is your single source for Bulk Plant & Terminal Loading Arm solutions.
Petroleum Bottom Loading Arms, Top Loading Arms Bottom Loading Arms. WSIs range of bottom loading arms for petroleum products are specifically designed for refined products such as gasoline, diesel, kerosene, ethanol, and lube oils etc. Whether for bottom loading multi compartment fuel trailers or a single compartment rail car there is a WSI bottom loading arm to suit the particular application.